diff --git a/static/chat/index.html b/static/chat/index.html
index 0813c11..b035d3b 100755
--- a/static/chat/index.html
+++ b/static/chat/index.html
@@ -19,7 +19,7 @@
     <input id="chat-input" type="text" placeholder="say anything" autofocus/>
   </section>
 
-  <script src="https://media.twiliocdn.com/sdk/js/chat/v3.4/twilio-chat.min.js"></script>
+  <script src="https://media.twiliocdn.com/sdk/js/chat/releases/4.0.0/twilio-chat.js"></script>
   <script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
   <script src="index.js"></script>
 </body>